KuyiniI-Snubber Capacitor?

Ezinhlelweni zikagesi neze-elekthronikhi zesimanje, amadivayisi okushintshana afana nama-transistors, ama-thyristors (SCR), ama-IGBT, kanye nama-relay adlala indima ebalulekile. Kodwa-ke, la madivayisi avame ukubhekana nokuphakama kwamandla kagesi kanye nezinguquko zamanje ezisheshayo ngenxa yemithwalo yokungenisa, okungaholela ekulimaleni, ukungasebenzi kahle, kanye nokuphazamiseka kwe-electromagnetic okungafuneki (EMI). Yilapho-keama-capacitor angenaluthongena emsebenzini.

Ukuqonda ama-Snubber Capacitors

A i-capacitor engenaluthoiyi-capacitor ekhethekile esetshenziswa kumasekethe angenawo ugesi ukuvikela amadivayisi okushintsha kusuka ekukhuphukeni kwamandla kagesi kanye nemisinga yesikhashana. Ngokuhlinzeka ngendlela ehlukile yesikhashana yamandla kagesi, ama-capacitor angenawo ugesi asiza ekunciphiseni ukucindezeleka ezingxenyeni zokushintsha, andise isikhathi sawo sokuphila, futhi athuthukise ukuthembeka kwesekethe.

Kungani Kudingeka Amasekethe E-Snubber?

Amasekethe e-snubber asetshenziswa ezinhlelweni ezahlukahlukene, okuhlanganisa:

• Amasekethe okunikeza amandla– ukucindezela ukuphakama kwamandla kagesi.
• Amasekethe okudlulisa kanye nokuxhumana– ukunciphisa ukwakheka kwe-arc phakathi kokuxhumana.
• Izishintshi ze-semiconductor (i-SCR, i-IGBT, i-GTO, njll.)– ukunciphisa ukukhuphuka kwamandla kagesi (dV/dt) kanye nokwanda kwamandla kagesi (di/dt), ukuvimbela ukuqhuma okungamanga kanye nokwehluleka kwedivayisi.

Isebenza Kanjani I-Snubber Circuits?

Amasekethe e-snubber ngokuvamile aqukethe i-capacitor noma i-inethiwekhi ye-resistor-capacitor (RC)ibekwe phezu kwedivayisi yokushintsha.

• Ukucindezelwa Kwe-Voltage Spike:Uma i-SCR noma i-transistor icima, umthwalo obangela ukuqhuma kwe-voltage ephezulu. I-capacitor engenalutho imunca la mandla, ivimbele ukucindezeleka okukhulu kwe-voltage.
• Ukulawula i-dV/dt:I-capacitor yehlisa izinga lokunyuka kwe-voltage kuyo yonke i-switch, igwema ukuvula okungahlosiwe (ukuqala okungamanga) kuma-thyristors nakwamanye ama-semiconductor.
• Ukulawula kwe-di/dt:Ukwengeza i-resistor ngokulandelana nge-capacitor kunciphisa ugesi ongenayo lapho iswishi ivula, okuvimbela ukucindezeleka okukhulu engxenyeni.

Izici Eziyinhloko Zama-Snubber Capacitors

Ama-capacitor e-Snubber aklanyelwe ukuphatha imisinga yemvamisa ephezulu kanye nama-pulse aphindaphindayo. Izici zawo ezibalulekile zifaka:

• Imvamisa yokusebenza ephezulu evumelekile (100 kHz noma ngaphezulu).
• Ukuzifudumeza okuphansi kanye nokulahlekelwa okuncane.
• Ukumelana nochungechunge olulinganayo oluphansi (i-ESR) ukuze kufakwe amandla kahle.
• Amandla kagesi aphezulu kanye namandla okuphatha imithwalo yesikhashana.

Izinhlobo zama-Snubber Capacitors

Ama-capacitor e-Snubber eza ngezinhlobo ezahlukene ngokusekelwe emazingeni amandla kanye nezidingo zohlelo lokusebenza:

• Ama-Capacitor e-Ceramic– Kufanelekela izinhlelo zokusebenza ezisebenzisa amandla aphansi.
• Ama-Capacitor efilimu yepulasitiki– Kusetshenziswa kumasekethe anamandla amakhulu, okuhlanganisa izinhlelo zezimoto zikagesi (i-EV) kanye nezilawuli zezimoto.
• Ama-Capacitor e-Polypropylene (MPP) ensimbi– Yakhelwe izinhlelo zokusebenza ezisebenza ngesivinini esiphezulu, ezinomthamo ophezulu wokungenisa umoya ophansi.

Ukukhetha i-Snubber Capacitor Efanele

Ukukhethwa kwe-capacitor ye-snubber kuncike ezintweni ezifana nalezi:

• Inani lomthamo:Ngokuvamile isukela ku-0.1µF kuya ku-10µF, kuye ngokuthi idivayisi yokushintsha kanye nokufakwa komthwalo.
• Isilinganiso se-voltage:Kufanele kube phezulu kune-voltage ephezulu yesekethe.
• I-ESR kanye nesilinganiso samanje:Kumelwe kube phansi ngokwanele ukuze kusingathwe imisinga yamanzi agelezayo ngaphandle kokushisa ngokweqile.

Kusetshenziswa kuphi ama-Snubber Capacitors?

Ama-capacitor e-Snubber atholakala ezimbonini nasezinhlelweni ezahlukahlukene, njenge:

• Amayunithi okuphakelwa kwamandla (ama-PSU)
• Izimoto zikagesi (ama-EV) kanye nezifunda zokulawula izimoto
• Izinhlelo zokwenza izinto ngokuzenzakalela zezimboni
• Izinhlelo zamandla avuselelekayo (ama-solar inverters, ama-wind turbines)

Isiphetho

Ama-capacitor e-snubber adlala indima ebalulekile ekuvikeleni amadivayisi okushintsha kusuka ekukhuphukeni kwamandla kagesi, ukulawula imisinga yesikhashana, kanye nokuthuthukisa ukusebenza kwesekethe iyonke. Njengoba amandla kagesi eqhubeka nokuthuthuka, isidingo sama-capacitor e-snubber asebenza kahle futhi athembekile sizoqhubeka sikhula. Kungakhathaliseki ukuthi kuseziphakelini zikagesi, ezenzakalelayo zezimboni, noma ezimotweni zikagesi, la ma-capacitor asiza ukuqinisekisa ukusebenza okubushelelezi nokuzinzile kumasekethe anamandla amakhulu.